PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates
Based on a self-developed hydrodynamic cavitation device with different geometric parameters for circular multi-orifice plates, turbulence characteristics of cavitating flow behind multi-orifice plates, including the effects of orifice number and orifice layout on longitudinal velocity, turbulence i...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-06-01
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| Series: | Water Science and Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674237020300508 |
| _version_ | 1818470686929190912 |
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| author | Zhi-ping Guo Xi-huan Sun Zhi-yong Dong |
| author_facet | Zhi-ping Guo Xi-huan Sun Zhi-yong Dong |
| author_sort | Zhi-ping Guo |
| collection | DOAJ |
| description | Based on a self-developed hydrodynamic cavitation device with different geometric parameters for circular multi-orifice plates, turbulence characteristics of cavitating flow behind multi-orifice plates, including the effects of orifice number and orifice layout on longitudinal velocity, turbulence intensity, and Reynolds stress, were measured with the particle image velocimetry (PIV) technique. Flow regimes of the cavitating flow were also observed with high-speed photography. The experimental results showed the following: (1) high-velocity multiple cavitating jets occurred behind the multi-orifice plates, and the cavitating flow fields were characterized by topological structures; (2) the longitudinal velocity at each cross-section exhibited a sawtooth-like distribution close to the multi-orifice plate, and each sawtooth indicated one jet issuing from one orifice; (3) there were similar magnitudes and forms for the longitudinal and vertical turbulence intensities at the same cross-section; (4) the variation in amplitude of Reynolds stress increased with an increase in orifice number; and (5) the cavitation clouds in the flow fields became denser with the increase in orifice number, and the clouds generated by the staggered layout of orifices were greater in number than those generated by the checkerboard-type one for the same orifice number. The experimental results can be used to analyze the mechanism of killing pathogenic microorganisms through hydrodynamic cavitation. |
| first_indexed | 2024-04-13T21:40:30Z |
| format | Article |
| id | doaj.art-30eb653655574d47b755ea58a942f165 |
| institution | Directory Open Access Journal |
| issn | 1674-2370 |
| language | English |
| last_indexed | 2024-04-13T21:40:30Z |
| publishDate | 2020-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Water Science and Engineering |
| spelling | doaj.art-30eb653655574d47b755ea58a942f1652022-12-22T02:28:45ZengElsevierWater Science and Engineering1674-23702020-06-01132145153PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice platesZhi-ping Guo0Xi-huan Sun1Zhi-yong Dong2College of Hydro-Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Department of Transportation Engineering, Shanxi Conservancy Technical Institute, Yuncheng 044004, ChinaCollege of Hydro-Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China; Corresponding author.Based on a self-developed hydrodynamic cavitation device with different geometric parameters for circular multi-orifice plates, turbulence characteristics of cavitating flow behind multi-orifice plates, including the effects of orifice number and orifice layout on longitudinal velocity, turbulence intensity, and Reynolds stress, were measured with the particle image velocimetry (PIV) technique. Flow regimes of the cavitating flow were also observed with high-speed photography. The experimental results showed the following: (1) high-velocity multiple cavitating jets occurred behind the multi-orifice plates, and the cavitating flow fields were characterized by topological structures; (2) the longitudinal velocity at each cross-section exhibited a sawtooth-like distribution close to the multi-orifice plate, and each sawtooth indicated one jet issuing from one orifice; (3) there were similar magnitudes and forms for the longitudinal and vertical turbulence intensities at the same cross-section; (4) the variation in amplitude of Reynolds stress increased with an increase in orifice number; and (5) the cavitation clouds in the flow fields became denser with the increase in orifice number, and the clouds generated by the staggered layout of orifices were greater in number than those generated by the checkerboard-type one for the same orifice number. The experimental results can be used to analyze the mechanism of killing pathogenic microorganisms through hydrodynamic cavitation.http://www.sciencedirect.com/science/article/pii/S1674237020300508Cavitating flowCircular multi-orifice platePIV techniqueHigh-speed photographyTurbulence characteristics |
| spellingShingle | Zhi-ping Guo Xi-huan Sun Zhi-yong Dong PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates Water Science and Engineering Cavitating flow Circular multi-orifice plate PIV technique High-speed photography Turbulence characteristics |
| title | PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates |
| title_full | PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates |
| title_fullStr | PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates |
| title_full_unstemmed | PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates |
| title_short | PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates |
| title_sort | piv analysis and high speed photographic observation of cavitating flow field behind circular multi orifice plates |
| topic | Cavitating flow Circular multi-orifice plate PIV technique High-speed photography Turbulence characteristics |
| url | http://www.sciencedirect.com/science/article/pii/S1674237020300508 |
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